EP2935159B1 - Flüssige dicyandiamid- und/oder alkylthiophosphortriamidzusammensetzungen und deren verwendung in landwirtschaftlichen anwendungen - Google Patents

Flüssige dicyandiamid- und/oder alkylthiophosphortriamidzusammensetzungen und deren verwendung in landwirtschaftlichen anwendungen Download PDF

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Publication number
EP2935159B1
EP2935159B1 EP13865033.8A EP13865033A EP2935159B1 EP 2935159 B1 EP2935159 B1 EP 2935159B1 EP 13865033 A EP13865033 A EP 13865033A EP 2935159 B1 EP2935159 B1 EP 2935159B1
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Prior art keywords
composition
dicyandiamide
dimethyl
organic solvent
alcohol
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English (en)
French (fr)
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EP2935159A1 (de
EP2935159A4 (de
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Marivi ORTIZ-SUAREZ
Thomas Ruch
Krish SHANMUGA
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Rhodia Operations SAS
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Rhodia Operations SAS
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    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C05G3/90—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting the nitrification of ammonium compounds or urea in the soil
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C7/00—Fertilisers containing calcium or other cyanamides
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C11/00—Other nitrogenous fertilisers
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C9/00—Fertilisers containing urea or urea compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
    • Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures

Definitions

  • This invention relates to liquid compositions comprising dicyandiamide and/or an alkyl thiophosphoric triamide, methods for incorporating dicyandiamide into agricultural fertilizer compositions, agricultural fertilizer compositions comprising dicyandiamide and/or an alkyl thiophosphoric triamide, and the use of such compositions.
  • Nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur are macronutrients that must be supplied to the plants and soil manually by farmers. In many crops, the amount of nitrogen supplied is critical to the overall quality and growth of the crop. Nitrogen is typically supplied in the form of nitrogenous, i.e., nitrogen precursor-containing, fertilizer compounds, such as urea, ammonium nitrate, or ammonium phosphate fertilizer compounds. Due to the high water solubility of these salts, however, applied nitrogen values may be lost due to run-off and leaching of the nitrogenous fertilizer compounds.
  • the nitrogenous fertilizer compounds are typically degraded, for example, by microorganisms present in the soil, to nitrogenous species such as NH 4 + , NO 2 - , NO 3 - , and ammonia gas, that may be even more readily lost through evaporation, run-off, and leaching than the fertilizer compounds themselves. If degradation of the fertilizer compounds occurs at a rate that is faster than the nitrogenous degradation products can be used by the plants, then the nitrogen values in the degradation products are at increased risk of being lost.
  • Nitrification and/or urease inhibitors are of potential use in delaying degradation of fertilizer compounds and thereby reducing losses of nitrogenous degradation products that would otherwise occurred in the absence of the inhibitors.
  • the use of nitrification and/or urease inhibitors in combination with nitrogenous fertilizer compounds tends to increase the amount of time the nitrogen source remains in the soil and available for absorption by the plants, which tends to increase the effectiveness of the fertilizer and positively impact crop yield and quality.
  • Aqueous end use fertilizer solutions are typically prepared in the field by diluting commercially available concentrated fertilizer compositions with water.
  • Commonly used concentrated fertilizer compositions include concentrated ammonium nitrate compositions, such as, for example, UAN 18, UAN 28, UAN 30 and UAN 32.
  • WO 2013/090324 A1 , WO 2014/055132 , DE 10 2007 062314 A1 , WO 2010/096266 A1 , WO 2010/072184 A2 , EP 2 032 589 B1 and US 5 698 003 A disclose compositions for use in agricultural applications comprising an alkyl thiophosphoric triamide in an organic solvent in a liquid medium.
  • Dicyandiamide is potentially useful as a nitrification inhibitor in such aqueous end use fertilizer compositions, but has very low solubility (about 41 grams per liter (“g/l”)) in water and so is difficult to incorporate into the aqueous end use fertilizer compositions, particularly under field conditions
  • Urease inhibitors can be used with a fertilizer (i.e., incorporated into a urea-containing fertilizer, e.g., urea and urea ammonium nitrate (UAN)) to slow the conversion of ammonium to ammonia gas and thus slow the loss of ammonia to volatilization, thus making ammonium available to plants in the soil for longer periods of time.
  • a fertilizer i.e., incorporated into a urea-containing fertilizer, e.g., urea and urea ammonium nitrate (UAN)
  • Nitrification inhibitors can be used with a fertilizer (i.e., incorporated into a urea-containing fertilizer, e.g., urea and urea ammonium nitrate (UAN)) to slow the process of ammonium conversion to nitrate, and subsequently the loss of nitrate to leeching, thus making ammonium available to plants in the soil for longer periods of time.
  • a fertilizer i.e., incorporated into a urea-containing fertilizer, e.g., urea and urea ammonium nitrate (UAN)
  • UAN ammonium nitrate
  • Ammonium is one of the main forms of nitrogen that can be utilized by plants. Increasing the amount of time that the nitrogen is available to the plant increases the effectiveness of the fertilizer which positively impacts crop yield and quality.
  • Fertilizers are common water soluble inorganic fertilizers that provide nutrients such as phosphorus-based, nitrogen-based, potassium-based or sulphur-based fertilizers.
  • fertilizers include: for nitrogen as the nutrient: nitrates and or ammonium salts such as ammonium nitrate, including in combination with urea e.g.
  • a fertilizer composition can comprise one or a combination of the fertilizers described herein.
  • NBPT N-(n-butyl)-thiophosphoric triamide
  • the use of a solvent system containing the NBPT is desirable as, in its liquid form, the solvent system is capable of distributing the NBPT into granular urea (e.g., urea prills) and into liquid fertilizers containing urea.
  • the NBPT is capable of being better dispersed in the liquid fertilizer.
  • Dicyandiamide is useful as a nitrification inhibitor in aqueous agricultural applications, e.g., end use fertilizer compositions, but similar to urease inhibitors face similar drawbacks.
  • Nitrification inhibitors such as dicyandiamide
  • dicyandiamide generally have very low solubility (about 41 grams per liter (“g/l”)) in water and so it is difficult to incorporate into the aqueous end use fertilizer compositions, particularly under field conditions.
  • nitrification inhibitors, such as dicyandiamide have a generally low solubility, they are used at low concentrations in water making it difficult to evenly distribute on urea-containing prills (i.e., large granules) and in soil.
  • dicyandiamide In order to evenly distribute the dicyandiamide onto the urea-containing prills or granules, dicyandiamide should be dispersed into a solvent carrier prior to being sprayed onto the urea.
  • a solvent system containing dicyandiamide (herein, also termed "DCD") is desirable as, in its liquid form, the solvent system is capable of distributing the dicyandiamide onto urea granules or prills, urea ammonium nitrate granules or prills or, otherwise, urea-containing granules or prills, and into liquid fertilizers containing urea or urea ammonium nitrate.
  • the dicyandiamide By introducing the dicyandiamide to liquid fertilizers containing urea (for example, urea-ammonium nitrate solutions or UAN) in a solvent system, the dicyandiamide is capable of being better dispersed in the liquid fertilizer.
  • urea for example, urea-ammonium nitrate solutions or UAN
  • concentrated fertilizer compositions include concentrated ammonium nitrate compositions, such as, for example, UAN 18, UAN 28, UAN 30 and UAN 32.
  • a solvent system containing dicyandiamide that has a favorable toxicological and/or ecological profile and desirable characteristics in terms of low volatility, biodegradability or ready biodegradability (i.e., readily biodegradable), low toxicity or low hazard level. It is also desirable to have a solvent system containing a combination of dicyandiamide and an alkyl thiophosphoric triamide, in particular, (N-(n-butyl)-thiophosphoric triamide), that has a favorable toxicological and/or ecological profile and desirable characteristics in terms of low volatility, biodegradability or ready biodegradability (i.e., readily biodegradable), low toxicity or low hazard level.
  • compositions for use in agricultural applications comprising a dicyandiamide which is dissolved in a liquid medium comprising an organic solvent selected from polar aprotic solvents, amine solvents, heterocyclic alcohol solvents, and mixtures thereof, wherein the organic solvent comprises dimethyl sulfoxide.
  • Described herein are methods of making a solid or concentrated liquid fertilizer compositions comprising treating one or more nitrogenous fertilizer compounds with an inhibitor composition that comprises at least one of a dicyandiamide or an alkyl thiophosphoric triamide.
  • the inhibitor composition in one embodiment, is dissolved in a liquid medium comprising an organic solvent selected from polar aprotic solvents, amine solvents, heterocyclic alcohol solvents, and mixtures thereof.
  • treating includes spray applying the inhibitor composition with the one or more nitrogenous fertilizer compounds.
  • treating includes spray contacting the inhibitor composition with the one or more nitrogenous fertilizer compounds.
  • concentrated liquid fertilizer compositions comprising, based on weight of the composition: (a) up to about 99 wt%, by weight of composition, of one or more nitrogenous fertilizer compounds, (b) a dicyandiamide (c) an organic solvent selected from polar aprotic solvents, amine solvents, heterocyclic alcohol solvents, and mixtures thereof, wherein the organic solvent comprises dimethyl sulfoxide, and (d) water.
  • solid or substantially solid fertilizer compositions comprising: (a) solid particles of one or more nitrogenous fertilizer compounds, and (b) an inhibitor composition comprising a dicyandiamide supported on at least a portion of the solid particles.
  • an aqueous end use fertilizer composition comprising incorporating: (a) one or more nitrogenous fertilizer compounds, and (b)an inhibitor composition that comprises a dicyandiamide the inhibitor composition dissolved in a liquid medium comprising an organic solvent selected from polar aprotic solvents, amine solvents, heterocyclic alcohol solvents, and mixtures thereof, wherein the organic solvent comprises dimethyl sulfoxide, in an aqueous medium.
  • aqueous end use fertilizer composition comprising, based on weight of the composition: (a) up to about 99 wt%, based on the weight of the composition, of one or more nitrogenous fertilizer compounds, (b) a dicyandiamide (c) an organic solvent selected from polar aprotic solvents, amine solvents, heterocyclic alcohol solvents, and mixtures thereof, wherein the organic solvent comprises dimethyl sulfoxide, and (d), optionally, water.
  • aqueous end use fertilizer composition that comprises: (a) one or more nitrogenous fertilizer compounds, (b) a dicyandiamide (c) an organic solvent comprising dimethyl sulfoxide, and optionally dimethyl formamide, the dimethyl ester of succinic acid, dimethyl ester of ethyl succinic acid, the dimethyl ester of glutaric acid, the dimethyl ester of methyl glutaric acid, and the dimethyl ester of adipic acid, diethylene triamine, or monoethanolamine, methyl-5-(dimethylamino)-2-methyl-oxopentanoate, dimethylaminoethanol, triethanol amine, a heterocyclic alcohol according to structure (III): and mixtures thereof, and, optionally, (d) water, to the target plants or to an environment for the target plants.
  • heterocyclic alcohol includes dioxolane compounds.
  • the alkyl thiophosphoric triamide is N-(n-butyl)-thiophosphoric triamide.
  • the liquid medium further comprises a solvent selected from the group consisting of: (a) at least one dioxolane compound of formula (III): wherein R 6 and R 7 individually comprises a hydrogen, an alkyl group, an alkenyl group, or a phenyl group, wherein n is an integer of from 1 to 10; b) at least one dibasic ester; c) at least one compound of formula (IIa): R 3 OOC-A-CONR 4 R 5 (IIa), wherein R 3 comprises a C 1 -C 36 alkyl group; wherein R 4 and R 5 individually comprise a C 1 -C 36 alkyl group, wherein R 4 and R 5 can optionally together form a ring; and wherein A is a linear or a branched divalent C 2 -C 6 alkyl group; d) at least one alkyl group
  • the present invention is directed to a nitrification inhibitor composition
  • a nitrification inhibitor composition comprising dicyandiamide dissolved in a liquid medium that comprises an organic solvent selected from polar aprotic solvents, dibasic esters, amines, amino alcohols, heterocyclic alcohols, and mixtures thereof, wherein the organic solvent comprises dimethyl sulfoxide.
  • the present invention is directed to a method of making a solid or concentrated liquid fertilizer composition
  • a nitrification inhibitor composition that comprises dicyandiamide dissolved in a liquid medium that comprises an organic solvent selected from polar aprotic solvents, amine solvents, heterocyclic alcohol solvents, and mixtures thereof.
  • the present invention is directed to a concentrated liquid fertilizer composition
  • a concentrated liquid fertilizer composition comprising, based on 100 parts by weight of the composition:
  • the present invention is directed to a concentrated solid fertilizer composition
  • a concentrated solid fertilizer composition comprising:
  • the present invention is directed to a method of making an aqueous end use fertilizer composition comprising incorporating:
  • the present invention is directed to an aqueous end use fertilizer composition
  • an aqueous end use fertilizer composition comprising, based on 100 parts by weight of the composition:
  • the present invention is directed to a method for fertilizing target plants, comprising applying an aqueous end use fertilizer composition that comprises:
  • alkyl means a saturated straight chain, branched chain, or cyclic hydrocarbon radical, including but not limited to, methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, t-butyl, pentyl, n-hexyl, and cyclohexyl.
  • aryl means a monovalent unsaturated hydrocarbon radical containing one or more six-membered carbon rings in which the unsaturation may be represented by three conjugated double bonds, which may be substituted one or more of carbons of the ring with hydroxy, alkyl, alkenyl, halo, haloalkyl, or amino, including but not limited to, phenoxy, phenyl, methylphenyl, dimethylphenyl, trimethylphenyl, chlorophenyl, trichloromethylphenyl, aminophenyl, and tristyrylphenyl.
  • alkylene means a divalent saturated straight or branched chain hydrocarbon radical, such as for example, methylene, dimethylene, trimethylene.
  • Dicyandiamide is a known compound according to formula (I):
  • Dicyandiamide also known as "2-cyanoguanidine”
  • 2-cyanoguanidine is typically made by treating cyanamide with base and is commercially available.
  • compositions according to the present invention comprise also a urease inhibitor, such as N-(n-butyl)-thiophosphoric triamide (“NBPT”) or ammonium thiosulfate, a nitrification inhibitor, or a combination of both a urease inhibitor and a nitrification inhibitor.
  • a urease inhibitor such as N-(n-butyl)-thiophosphoric triamide (“NBPT") or ammonium thiosulfate
  • NBPT N-(n-butyl)-thiophosphoric triamide
  • alkyl thiophosphoric triamide is N-(n-butyl)-thiophosphoric triamide.
  • the dicyandiamide or combination thereof with at least an alkyl thiophosric triamide can be present in the composition at a lower range of 5% by weight of the composition.
  • the dicyandiamide or combination thereof with an alkyl thiophosphoric triamide can be present in the composition at a lower range of 6%, or 8%, or 10% or 12% or 14%, by weight of the composition.
  • the dicyandiamide or combination thereof with an alkyl thiophosphoric triamide can be present in the composition in an amount between about 7% by weight of the composition to about 13% by weight of the composition..
  • the dicyandiamide or combination thereof with an alkyl thiophosphoric triamide can be present in the composition in an amount between about 8% by weight of the composition to about 12% by weight of the composition.
  • the dicyandiamide or combination thereof with an alkyl thiophosphoric triamide can be present in the composition in an amount between about 0.5 % by weight of the composition and about 50 % by weight of the composition or, in another embodiment, can be present in the composition in an amount between about 1 % by weight of the composition and about 40 % by weight of the composition, and, in another embodiment, can be present in the composition in an amount between about 0.5 % by weight of the composition and about 20 % by weight of the composition. In one particular embodiment, the dicyandiamide or combination thereof with an alkyl thiophosphoric triamide is present in the composition in an amount between about 1 % by weight of the composition and about 30 % by weight of the composition.
  • the dicyandiamide or combination thereof with an alkyl thiophosphoric triamide means that dicyandiamide can be solely present, or a combination of alkyl thiophosphoric triamide and dicyandiamide is present.
  • the organic solvent component of the composition and methods of the present invention are those polar aprotic solvents, amine solvents, heterocyclic alcohol solvents, and mixtures thereof that are liquid at temperatures of from 20 to 50°C, and that do not react with dicyandiamide under anticipated manufacturing, storage, and use conditions.
  • the solvent comprises a polar aprotic solvent, amine solvent, heterocyclic alcohol solvent, or mixtures thereof, wherein the organic solvent comprises dimethyl sulfoxide in which dicyandiamide has a solubility at 25 °C of greater than or equal to 50 grams per liter (g/l), more typically greater than or equal to 200 g/l.
  • Suitable polar aprotic organic solvents include, for example, dichloromethane, dimethyl acetamide, dimethyl formamide, ethyl acetate, hexamethylphosphoramide, dimethyl sulfone, sulfolane, 1,3-dimethyl-2-imidazoidinone, 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidone, methyl acetate, ethyl lactate, methylpyrrolidone, tetrahydrofuran, propylene carbonate, and dibasic ester solvents.
  • Suitable dibasic ester solvents include, for example, dialkyl esters of dicarboxylic acids, more typically, the di(C 1 -C 12 )alkyl esters of saturated linear or branched (C 2 -C 8 )aliphatic carboxylic acids or a mixture thereof.
  • the dibasic ester component comprises one or more compounds according to structure (II): R 1 OOC-A-CONR 2 R 3 (II) wherein:
  • the dibasic ester solvent component of the compositions and methods of the present invention comprises one or more dimethyl esters of saturated linear or branched (C 4 -C 6 )aliphatic carboxylic acids, such the dimethyl ester of succinic acid, dimethyl ester of ethyl succinic acid, the dimethyl ester of glutaric acid, the dimethyl ester of methyl glutaric acid, and the dimethyl ester of adipic acid, and mixtures thereof.
  • dimethyl esters of saturated linear or branched (C 4 -C 6 )aliphatic carboxylic acids such the dimethyl ester of succinic acid, dimethyl ester of ethyl succinic acid, the dimethyl ester of glutaric acid, the dimethyl ester of methyl glutaric acid, and the dimethyl ester of adipic acid, and mixtures thereof.
  • the dibasic ester component comprises the dimethyl ester of succinic acid, the dimethyl ester of glutaric acid, and optionally, the dimethyl ester of adipic acid
  • the dibasic ester component comprises the dimethyl ester of ethyl succinic acid, the dimethyl ester of methyl glutaric acid, and optionally, the dimethyl ester of adipic acid.
  • the dibasic ester solvent component of the compositions and methods of the present invention comprises one or more dialkyl esters of saturated linear or branched (C 4 -C 6 )aliphatic carboxylic acids, such the dialkyl ester of succinic acid, dialkyl ester of ethylsuccinic acid, the dialkyl ester of glutaric acid, the dialkyl ester of methylglutaric acid, and the dialkyl ester of adipic acid, and mixtures thereof.
  • dialkyl esters of saturated linear or branched (C 4 -C 6 )aliphatic carboxylic acids such the dialkyl ester of succinic acid, dialkyl ester of ethylsuccinic acid, the dialkyl ester of glutaric acid, the dialkyl ester of methylglutaric acid, and the dialkyl ester of adipic acid, and mixtures thereof.
  • the dibasic ester component comprises the dialkyl ester of succinic acid, the dialkyl ester of glutaric acid, and optionally, the dimethyl ester of adipic acid
  • the dibasic ester component comprises the dialkyl dimethyl ester of ethylsuccinic acid, the dialkyl ester of methylglutaric acid, and optionally, the dialkyl ester of adipic acid.
  • Each alkyl group in the dialkyl group one embodiment, individually comprise a C 1 -C 8 alkyl.
  • each alkyl group in the dialkyl group one embodiment, individually comprise a C 1 -C 4 alkyl.
  • each alkyl group in the dialkyl group one embodiment, individually comprise a C 1 -C 6 alkyl.
  • Suitable amine solvents include primary amines, including monoalkylamines, such as propylamine, secondary amines, including dialkyl amines and diaryl amines, such as dimethylamine and diphenylamine, and tertiary amines, such as diethylene triamine and methyl-5-(dimethylamino)-2-methyl-oxopentanoate.
  • the amine solvent component of the compositions and methods of the present invention is selected from aliphatic or aromatic primary, secondary, or tertiary amines that do not comprise any functional group other than one or more amino groups.
  • the amine solvent component of the compositions and methods of the present invention is selected from aliphatic or aromatic primary, secondary, or tertiary amines may optionally further comprise one or more additional functional groups, such as hydroxyalkyl groups, hydroxyl groups, carbonyl groups, or alkyl ester groups, other than one or more amino groups.
  • the organic solvent component of the compositions and methods of the present invention comprises an amino alcohol.
  • Compounds suitable as the amino alcohol solvent component of the compositions and methods of the present invention are those compounds that comprise at least one primary, secondary, or tertiary amino moiety per molecule and at least one hydroxyalkyl moiety per molecule, more typically
  • the amino alcohol is a linear, branched, or cyclic, saturated or unsaturated hydrocarbon that is substituted on at least one carbon atom with an amino group and on at least one other carbon atom with hydroxyalkyl or hydroxyl group, such as monoethanolamine, ethylaminoethanol, dimethylaminoethanol, isopropylaminoethanol, diethanolamine, triethanolamine, methylaminoethanol, aminopropanol, methylaminopropanol, dimethylaminopropanol, aminobutanol, dimethylaminobutanol, aminobutanediol, trihydroxymethylaminoethane,
  • Suitable heterocyclic alcohol solvents include, for example, 5- or 6-membered heterocyclic rings that include 1 or 2 oxygen atoms as ring member, that are substituted on at least one carbon atom of the ring with a (C 1 -C 6 )hydroxyalkyl group, and that may optionally be substituted on one or more carbon atoms of the ring with one or more (C 1 -C 4 )alkyl groups.
  • heterocyclic alcohol includes dioxolane compounds.
  • the organic solvent component of the composition and methods of the present invention comprises one or more polar aprotic solvents, one or more dibasic ester compounds according to structure (II), one or more amino alcohols, one or more tertiary amines, one or more heterocyclic alcohols according to structure (III), or a mixture thereof.
  • the organic solvent component of the composition and methods of the present invention comprises dimethyl sulfoxide, dimethyl formamide, the dimethyl ester of succinic acid, dimethyl ester of ethyl succinic acid, the dimethyl ester of glutaric acid, the dimethyl ester of methyl glutaric acid, and the dimethyl ester of adipic acid, diethylene triamine, or monoethanolamine, methyl-5-(dimethylamino)-2-methyl-oxopentanoate, dimethylaminoethanol, triethanol amine, a heterocyclic alcohol according to structure (III), or a mixture thereof.
  • the organic solvent component of the composition and methods of the present invention comprises dimethyl sulfoxide, dimethyl formamide, diethylene triamine, monoethanolamine, or a mixture thereof.
  • the organic solvent component of the composition and methods of the present invention comprises dimethyl sulfoxide.
  • a compound utilized as the solvent or as a component in the solvent blend is a compound of general formula (II): R 3 OOC-A-CONR 4 R 5 (II),
  • the expression “compound” denotes any compound corresponding to the general formula (II).
  • the term “compound” also refers to mixtures of several molecules corresponding to general formula (II). It may therefore be a molecule of formula (II) or a mixture of several molecules of formula (II), wherein both fall under the definition of the term “compound” when referring to formula (II).
  • the R 3 , R 4 and R 5 groups can be, in some embodiments, identical or, in other embodiment, different. In one embodiment, may be groups chosen from C 1 -C 20 alkyl, aryl, alkaryl or arylalkyl groups or the phenyl group. In another embodiment, may be groups chosen from C 1 -C 12 alkyl, aryl, alkaryl or arylalkyl groups or the phenyl group. Mention is made especially of Rhodiasolv® PolarClean (Manufactured by Rhodia Inc. of Cranbury, NJ). The R 4 and R 5 groups may optionally be substituted. In one particular embodiment, the groups are substituted with hydroxyl groups.
  • R 3 group is chosen from methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, n-pentyl, isopentyl, isoamyl, n-hexyl, cyclohexyl, 2-ethylbutyl, n-octyl, isooctyl, 2-ethylhexyl, tridecyl groups.
  • R 4 and R 5 groups which are identical or different, in one embodiment, may especially be chosen from methyl, ethyl, propyl (n-propyl), isopropyl, n-butyl, isobutyl, n-pentyl, amyl, isoamyl, hexyl, cyclohexyl or hydroxyethyl groups.
  • the R 4 and R 5 groups may also be such that they form, together with the nitrogen atom, a morpholine, piperazine or piperidine group.
  • R 4 and R 5 are each methyl, or R 4 and R 5 are each ethyl, or R 4 and R 5 are each hydroxyethyl.
  • A comprises a linear group of formula -- CH 2 -CH 2 -- and/or of formula -- CH 2 -- CH 2 -- CH 2 -- CH 2 -- and/or of formula --(CH 2 ) 8 -- then it is a mixture of A groups.
  • A is linear, then it is a mixture of A groups, for example a mixture of two or three -- CH 2 -- CH 2 -- (ethylene);-CH 2 -- CH 2 -- CH 2 -- (n-propylene); and -- CH 2 -- CH 2 -- CH 2 -- CH 2 -- (n-butylene) groups (or isomers thereof).
  • the A group is a divalent linear alkyl group chosen from the groups of the following formulae: -- CH 2 -CH 2 -- (ethylene); -- CH 2 -- CH 2 -- CH 2 -- (n-propylene); -- CH 2 -- CH 2 -- CH 2 -- CH 2 -- (n-butylene), and mixtures thereof.
  • the inhibitor composition of the present invention comprises, based on 100 parts by weight (“pbw”) of the composition:
  • the inhibitor composition of the present invention comprises one or more urease inhibitors, such as, for example, NBPT or ammonium thiosulfate.
  • the nitrogenous fertilizer compound is treated with the inhibitor composition by contacting the nitrogenous fertilizer composition with the inhibitor composition described herein (e.g., nitrification inhibitor or urease inhibitor or a combination of both).
  • the nitrogenous fertilizer composition may be in solid or liquid form.
  • Suitable nitrogenous fertilizers are those containing a nitrogenous compound such as urea, nitrate salts, ammonium salt, or a mixture thereof, such as ammonium nitrate, ammonium sulfate, ammonium thiosulfate, ammonium polysulfide, ammonium phosphates, ammonium chloride, ammonium bicarbonate, anhydrous ammonia, calcium nitrate, nitrate soda, calcium cyanamide.
  • the nitrogenous fertilizer comprises ammonium nitrate.
  • Suitable ammonium nitrate-containing fertilizers include, for example, UAN 18, UAN 28, and UAN 30.
  • the nitrogenous fertilizer composition is in solid particulate form, and the contacting of the nitrogenous fertilizer composition with the inhibitor composition is conducted by, for example, spraying the composition of the present invention on the particles of solid fertilizer composition.
  • the concentrated fertilizer composition of the present invention is a solid nitrification-inhibited fertilizer composition that comprises, based on 100 pbw of the composition:
  • the solid nitrification-inhibited fertilizer composition of the present invention further comprises one or more urease inhibitors, more typically NBPT.
  • the end use fertilizer composition of the present invention is made by combining the inhibitor composition of the present invention with a solid nitrogenous fertilizer to form a solid nitrification-inhibited fertilizer composition and subsequently dissolving the solid nitrification-inhibited fertilizer composition in an aqueous medium, typically water, in a ratio of up to about 500 pbw, more typically from 100 to 500 pbw and even more typically from about 100 to about 300 pbw, of the aqueous medium per 1 pbw of the solid nitrification-inhibited fertilizer composition.
  • an aqueous medium typically water
  • the fertilizer compound is in liquid form and the contacting of the fertilizer composition with the inhibitor composition is conducted by mixing the inhibitor composition with the liquid fertilizer composition.
  • the concentrated fertilizer composition of the present invention is a concentrated liquid nitrification-inhibited fertilizer composition that comprises, based on 100 pbw of the composition:
  • the concentrated liquid nitrification-inhibited fertilizer composition of the present invention further comprises one or more urease inhibitors, more typically NBPT.
  • the end use fertilizer composition of the present invention is made by combining the inhibitor composition of the present invention with a concentrated nitrogenous fertilizer to form a concentrated liquid nitrification-inhibited fertilizer composition and subsequently diluting the concentrated liquid nitrification-inhibited fertilizer composition with an aqueous medium, typically water in a ratio of up to about 500 pbw, more typically from about 10 to about 500 pbw and even more typically from about 100 to about 300 pbw, of the aqueous medium per 1 pbw concentrated liquid nitrogenous fertilizer composition.
  • an aqueous medium typically water in a ratio of up to about 500 pbw, more typically from about 10 to about 500 pbw and even more typically from about 100 to about 300 pbw, of the aqueous medium per 1 pbw concentrated liquid nitrogenous fertilizer composition.
  • the end use fertilizer composition of the present invention is made by combining the inhibitor composition of the present invention, a solid or concentrated liquid nitrogenous fertilizer, and an aqueous medium.
  • the end use fertilizer composition of the present invention is an aqueous liquid composition that comprises water, one or more nitrogenous fertilizer compounds, and dicyandiamide, typically in an amount of from 2 x 10 -6 pbw to about4 pbw dicyandiamide per 100 pbw of the end use fertilizer composition.
  • the end use fertilizer composition of the present invention comprises water and based on 100 parts by weight of the composition:
  • the end use fertilizer composition of the present invention comprises one or more urease inhibitors, more typically NBPT, alone or in combination with the nitrification inhibitor.
  • the end use fertilizer composition of the present invention comprises from about 0.001 to about 5 pbw, more typically from about 0.01 to about 2 pbw dicyandiamide per 100 pbw of the one or more nitrogenous fertilizer compounds.
  • the end use fertilizer composition is applied to target plants or to an environment for the target plants, i.e., to ground on or within which the target plants are growing or to be grown, at a rate of from about 0.01 pounds to about 5 pounds of the fertilizer composition, more typically from about 0.05 pounds to about 2 pounds of the fertilizer composition, per 100 square feet of ground.
  • the end use fertilizer composition is applied to target plants or to an environment for the target plants at a rate effective to provide a dosage of nitrogenous fertilizer compound of from about 0.01 pounds to about 5 pounds of fertilizer compound, more typically from about 0.05 pounds to 2 pounds of fertilizer compound, per 100 square feet of ground.
  • the end use fertilizer composition is applied to target plants or to an environment for the target plants at a rate effective to provide a dosage of dicyandiamide of from about 0.01 pounds to 5 pounds of dicyandiamide, more typically from about 0.05 pounds to 2 pounds of dicyandiamide, per 1000 square feet of ground.
  • composition of the present invention provides improved ease of handling of dicyandiamide, improved solubility characteristics, low toxicity of the organic solvents; good storage characteristics, and excellent miscibility with aqueous compositions, such as aqueous nitrogenous fertilizer formulations.
  • Example 1 The composition of Example 1 was made by dissolving 30 pbw dicyandiamide (“DCD”) in 70 pbw dimethyl sulfoxide (“DMSO”).
  • DCD dicyandiamide
  • DMSO dimethyl sulfoxide
  • Samples of the 30 DCD/70 DMSO solution were analyzed by NMR spectroscopy immediately after formation and at 3 weeks after formation and were in each case found to contain no evidence of any reaction having occurred between the DCD and the DMSO.
  • Samples 30 DCD/70 DMSO solution were stored at -16°C, 4°C, RT,45 and 54°C and subjected to freeze-thaw cycling (cycling between 25 °C and -12 °C, with a 12 hour dwell at each temperature extreme and an 8 hour ramp between the temperature extremes) and the stability of the solution was evaluated after 1 week, after 2 weeks, and after 1 month of storage under each of the storage conditions and was found to be stable under each of the storage conditions.
  • Example 2 The composition of Example 2 was made by dissolving 21 pbw DCD in 79 pbw monoethanol amine.
  • Example 3 The composition of Example 3 was made by dissolving 12 pbw DCD in a mixture of 62 pbw of a mixture of methyl-5-(dimethylamino)-2-methyl-oxopentanoate,, 9 pbw propylene carbonate, and 17 pbw water
  • Example 4 The composition of Example 4 was made by dissolving 30 pbw DCD and 15 pbw N-(n-butyl)-thiophosphoric triamide in 55 pbw dimethyl sulfoxide.
  • compositions of Examples 2, 3, and 4 were analyzed by NMR spectroscopy immediately after formation as were in each case found to be free of evidence of any reaction having occurred between the DCD and the respective organic solvent system.
  • compositions of Examples 2, 3, and 4 was found to be stable after storage at room temperature for at least one month.
  • NBPT (50 wt%, by weight of mixture) in DMSO (50 wt%) samples were put through stability testing at -16°C, 4°C, 25°C, 45°C, 54°C and subjected to freeze-thaw cycling (cycling between 25 °C and -12 °C, with a 12 hour dwell at each temperature extreme and an 8 hour ramp between the temperature extremes).
  • the stability of the sample was evaluated after two weeks. All the samples were observed to remained in 1 phase, although the samples became darker at higher temperatures.

Claims (22)

  1. Zusammensetzung zur Verwendung bei landwirtschaftlichen Anwendungen, umfassend ein Dicyandiamid gelöst in einem flüssigen Medium, umfassend ein organisches Lösungsmittel, umfassend ein polares aprotisches Lösungsmittel, ein Aminlösungsmittel, ein Heterocyclischer-Alkohol-Lösungsmittel oder eine Mischung davon, wobei das organische Lösungsmittel Dimethylsulfoxid umfasst.
  2. Zusammensetzung nach Anspruch 1, umfassend eine Kombination eines Dicyandiamids und eines Alkylthiophosphorsäuretriamids.
  3. Zusammensetzung nach Anspruch 2, wobei es sich bei dem Alkylthiophosphorsäuretriamid um N-(n-Butyl)thiophosphorsäuretriamid handelt.
  4. Zusammensetzung nach Anspruch 1 oder 2, wobei das organische Lösungsmittel Folgendes umfasst:
    (a) mindestens eine Dioxolanverbindung der Formel (Ia) :
    Figure imgb0013
     wobei R6 und R7 individuell ein Wasserstoffatom, eine Alkylgruppe, eine Alkenylgruppe oder eine Phenylgruppe umfassen, wobei n für eine ganze Zahl von 1 bis 10 steht,
    b) mindestens einen dibasischen Ester,
    c) mindestens eine Verbindung der Formel (IIa):

            R3OOC-A-CONR4R5     (IIa),

    wobei R3 eine C1-C36-Alkylgruppe umfasst, wobei R4 und R5 individuell eine C1-C36-Alkylgruppe umfassen, wobei R4 und R5 zusammen einen Ring bilden können, und wobei A für eine geradkettige oder verzweigte zweiwertige C2-C6-Alkylgruppe steht,
    d) mindestens ein Alkyldimethylamid,
    e) mindestens einen Milchsäurealkylester,
    f) Lävulinsäureethylester,
    g) mindestens einen Alkyloxyalkohol, Etheralkohol, Aminalkohol, Aminoalkohol oder Alkohol,
    h) mindestens ein Glycerin oder Glycerinderivat,
    i) mindestens ein Alkylencarbonat oder
    j) eine beliebige Kombination davon.
  5. Zusammensetzung nach Anspruch 1 oder 2, wobei es sich bei dem organischen Lösungsmittel um Dimethylsulfoxid handelt.
  6. Zusammensetzung nach Anspruch 1 oder 2, wobei das polare aprotische Lösungsmittel aus der aus Dichlormethan, Dimethylacetamid, Dimethylformamid, Essigsäureethylester, Hexamethylphosphorsäureamid, Dimethylsulfon, Sulfolan, 1,3-Dimethyl-2-imidazolidinon, 1,3-Dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidon, Essigsäuremethylester, Milchsäureethylester, Methylpyrrolidon, Tetrahydrofuran, Propylencarbonat und dibasischen Esterlösungsmitteln bestehenden Gruppe ausgewählt ist.
  7. Verfahren zur Herstellung einer festen oder konzentrierten flüssigen Düngemittelzusammensetzung, bei dem man eine oder mehrere stickstoffhaltige Düngemittelverbindungen mit einer ein Dicyandiamid umfassenden Inhibitorzusammensetzung behandelt, wobei die Inhibitorzusammensetzung gelöst ist in einem flüssigen Medium umfassend ein organisches Lösungsmittel ausgewählt aus polaren aprotischen Lösungsmitteln, Aminlösungsmitteln, Heterocyclischer-Alkohol-Lösungsmitteln und Mischungen davon, wobei das organische Lösungsmittel Dimethylsulfoxid umfasst.
  8. Verfahren nach Anspruch 7, wobei die Inhibitorzusammensetzung eine Kombination eines Dicyandiamids und eines alkylthiophosphorsäuretriamids umfasst.
  9. Verfahren nach Anspruch 8, wobei es sich bei dem Alkylthiophosphorsäuretriamid um N-(n-Butyl)thiophos-phorsäuretriamid handelt.
  10. Verfahren nach Anspruch 7 oder 8, wobei das Lösungsmittel Folgendes umfasst:
    (a) mindestens eine Dioxolanverbindung der Formel (Ia) :
    Figure imgb0014
     wobei R6 und R7 individuell ein Wasserstoffatom, eine Alkylgruppe, eine Alkenylgruppe oder eine Phenylgruppe umfassen, wobei n für eine ganze Zahl von 1 bis 10 steht,
    b) mindestens einen dibasischen Ester,
    c) mindestens eine Verbindung der Formel (IIa):

            R3OOC-A-CONR4R5     (IIa),

    wobei R3 eine C1-C36-Alkylgruppe umfasst, wobei R4 und R5 individuell eine C1-C36-Alkylgruppe umfassen, wobei R4 und R5 zusammen einen Ring bilden können, und wobei A für eine geradkettige oder verzweigte zweiwertige C2-C6-Alkylgruppe steht,
    d) mindestens ein Alkyldimethylamid,
    e) mindestens einen Milchsäurealkylester,
    f) Lävulinsäureethylester,
    g) mindestens einen Alkyloxyalkohol, Etheralkohol, Aminalkohol, Aminoalkohol oder Alkohol,
    h) mindestens ein Glycerin oder Glycerinderivat,
    i) mindestens ein Alkylencarbonat oder
    j) eine beliebige Kombination davon.
  11. Verfahren nach Anspruch 7 oder 8, wobei das organische Lösungsmittel Dimethylsulfoxid ist.
  12. Verfahren nach Anspruch 7 oder 8, wobei das polare aprotische Lösungsmittel aus der aus Dichlormethan, Dimethylacetamid, Dimethylformamid, Essigsäureethylester, Hexamethylphosphorsäureamid, Dimethylsulfon, Sulfolan, 1,3-Dimethyl-2-imidazolidinon, 1,3-Dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidon, Essigsäuremethylester, Milchsäureethylester, Methylpyrrolidon, Tetrahydrofuran, Propylencarbonat und dibasischen Esterlösungsmitteln bestehenden Gruppe ausgewählt ist.
  13. Konzentrierte flüssige Düngemittelzusammensetzung, umfassend, bezogen auf 100 Gewichtsteile der Zusammensetzung:
    (a) bis zu etwa 99 Gewichtsteile einer oder mehrerer stickstoffhaltiger Düngemittelverbindungen,
    (b) ein Dicyandiamid,
    (c) ein organisches Lösungsmittel ausgewählt aus polaren aprotischen Lösungsmitteln, Aminlösungsmitteln, Heterocyclischer-Alkohol-Lösungsmitteln und Mischungen davon, wobei das organische Lösungsmittel Dimethylsulfoxid umfasst, und
    (d) Wasser.
  14. Zusammensetzung nach Anspruch 13, umfassend eine Kombination eines Dicyandiamids und eines Alkylthiophosphorsäuretriamids.
  15. Flüssige Düngemittelzusammensetzung nach Anspruch 13 oder 14, wobei das organische Lösungsmittel Folgendes umfasst:
    (a) mindestens eine Dioxolanverbindung der Formel (Ia) :
    Figure imgb0015
     wobei R6 und R7 individuell ein Wasserstoffatom, eine Alkylgruppe, eine Alkenylgruppe oder eine Phenylgruppe umfassen, wobei n für eine ganze Zahl von 1 bis 10 steht,
    b) mindestens einen dibasischen Ester,
    c) mindestens eine Verbindung der Formel (IIa):

            R3OOC-A-CONR4R5     (IIa),

    wobei R3 eine C1-C36-Alkylgruppe umfasst, wobei R4 und R5 individuell eine C1-C36-Alkylgruppe umfassen, wobei R4 und R5 zusammen einen Ring bilden können, und wobei A für eine geradkettige oder verzweigte zweiwertige C2-C6-Alkylgruppe steht,
    d) mindestens ein Alkyldimethylamid,
    e) mindestens einen Milchsäurealkylester,
    f) Lävulinsäureethylester,
    g) mindestens einen Alkyloxyalkohol, Etheralkohol, Aminalkohol, Aminoalkohol oder Alkohol,
    h) mindestens ein Glycerin oder Glycerinderivat,
    i) mindestens ein Alkylencarbonat oder
    j) eine beliebige Kombination davon.
  16. Verfahren zur Herstellung einer wässrigen Endanwendungs-Düngemittelzusammensetzung, bei dem man:
    (a) eine oder mehrere stickstoffhaltige Düngemittelverbindungen und
    (b) eine Inhibitorzusammensetzung, die Dicyandiamid umfasst, wobei die Inhibitorzusammensetzung in einem flüssigen Medium, umfassend ein organisches Lösungsmittel ausgewählt aus polaren aprotischen Lösungsmitteln, Aminlösungsmitteln, Heterocyclischer-Alkohol-Lösungsmitteln und Mischungen davon, wobei das organische Lösungsmittel Dimethylsulfoxid umfasst, gelöst ist,
    in ein wässriges Medium einarbeitet.
  17. Verfahren nach Anspruch 16, wobei die Inhibitorzusammensetzung eine Kombination eines Dicyandiamids und eines Alkylthiophosphorsäuretriamids umfasst.
  18. Verfahren nach Anspruch 16 oder 17, wobei das organische Lösungsmittel Folgendes umfasst:
    (a) mindestens eine Dioxolanverbindung der Formel (Ia) :
    Figure imgb0016
     wobei R6 und R7 individuell ein Wasserstoffatom, eine Alkylgruppe, eine Alkenylgruppe oder eine Phenylgruppe umfassen, wobei n für eine ganze Zahl von 1 bis 10 steht,
    b) mindestens einen dibasischen Ester,
    c) mindestens eine Verbindung der Formel (IIa):

            R3OOC-A-CONR4R5     (IIa),

    wobei R3 eine C1-C36-Alkylgruppe umfasst, wobei R4 und R5 individuell eine C1-C36-Alkylgruppe umfassen, wobei R4 und R5 zusammen gegebenenfalls einen Ring bilden können, und wobei A für eine geradkettige oder verzweigte zweiwertige C2-C6-Alkylgruppe steht,
    d) mindestens ein Alkyldimethylamid,
    e) mindestens einen Milchsäurealkylester,
    f) Lävulinsäureethylester,
    g) mindestens einen Alkyloxyalkohol, Etheralkohol, Aminalkohol, Aminoalkohol oder Alkohol,
    h) mindestens ein Glycerin oder Glycerinderivat,
    i) mindestens ein Alkylencarbonat oder
    j) eine beliebige Kombination davon.
  19. Wässrige Endanwendungs-Düngemittelzusammensetzung, umfassend, bezogen auf 100 Gewichtsteile der Zusammensetzung:
    (a) bis zu etwa 99 Gewichtsteile einer oder mehrerer stickstoffhaltiger Düngemittelverbindungen,
    (b) ein Dicyandiamid,
    (c) ein organisches Lösungsmittel ausgewählt aus polaren aprotischen Lösungsmitteln, Aminlösungsmitteln, Heterocyclischer-Alkohol-Lösungsmitteln und Mischungen davon, wobei das organische Lösungsmittel Dimethylsulfoxid umfasst, und
    (d) Wasser.
  20. Zusammensetzung nach Anspruch 19, umfassend eine Kombination eines Dicyandiamids und eines Alkylthiophosphorsäuretriamids.
  21. Verfahren zum Düngen von Zielpflanzen, bei dem man eine wässrige Endanwendungs-Düngemittelzusammensetzung, umfassend:
    (a) eine oder mehrere stickstoffhaltige Düngemittelverbindungen,
    (b) ein Dicyandiamid,
    (c) ein organisches Lösungsmittel, umfassend Dimethylsulfoxid und gegebenenfalls Dimethylformamid, den Dimethylester von Bernsteinsäure, den Dimethylester von Ethylbernsteinsäure, den Dimethylester von Glutarsäure, den Dimethylester von Methylglutarsäure und den Dimethylester von Adipinsäure, Diethylentriamin oder Monoethanolamin, 5-(Dimethylamino)-2-methyloxopentansäuremethylester, Dimethylaminoethanol, Triethanolamin, einen heterocyclischen Alkohol gemäß Struktur (III):
    Figure imgb0017
     und Mischungen davon, und
    (d) Wasser,
    auf die Zielpflanzen oder die Umgebung der Zielpflanzen aufbringt.
  22. Verfahren nach Anspruch 21, wobei die Endanwendungs-Düngemittelzusammensetzung eine Kombination eines Dicyandiamids und eines Alkylthiophosphorsäuretriamids umfasst.
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